diff --git a/flake.lock b/flake.lock
index 4a0e5b5..1698b1d 100644
--- a/flake.lock
+++ b/flake.lock
@@ -2,31 +2,16 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1634551044,
-        "narHash": "sha256-HOHemrQt3wA7eS5YT8n+X0OdB9+X4O08YUPTrFMBG60=",
-        "owner": "NixOS",
+        "lastModified": 1634327140,
+        "narHash": "sha256-d5L7oMjUVC6VU0cQMsF0tceAPkmzuAQ51DWBFNChbEQ=",
+        "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "f001876680c0e32a89bced8d02d2c61250684e17",
+        "rev": "83667ff60a88e22b76ef4b0bdf5334670b39c2b6",
         "type": "github"
       },
       "original": {
-        "id": "nixpkgs",
+        "owner": "nixos",
         "ref": "nixos-21.05",
-        "type": "indirect"
-      }
-    },
-    "nixpkgs-nyanloutre-pysmart": {
-      "locked": {
-        "lastModified": 1634643555,
-        "narHash": "sha256-Fu0JVScZt0fUqfeo2tsTUcoehtpalBU7+15pxy1Ld+Y=",
-        "owner": "nyanloutre",
-        "repo": "nixpkgs",
-        "rev": "256d8d34f05c8badeaf3ecb615d3af08a4b492d6",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nyanloutre",
-        "ref": "pysmart-init",
         "repo": "nixpkgs",
         "type": "github"
       }
@@ -35,15 +20,16 @@
       "locked": {
         "lastModified": 1634436779,
         "narHash": "sha256-D/nrXTWpe1bPIjFy85sgiLHYqu+AeaC6v5/+KlA9PRg=",
-        "owner": "NixOS",
+        "owner": "nixos",
         "repo": "nixpkgs",
         "rev": "9aeeb7574fb784eaf6395f4400705b5f619e6cc3",
         "type": "github"
       },
       "original": {
-        "id": "nixpkgs",
+        "owner": "nixos",
         "ref": "nixos-unstable",
-        "type": "indirect"
+        "repo": "nixpkgs",
+        "type": "github"
       }
     },
     "nixpkgs_2": {
@@ -64,7 +50,6 @@
     "root": {
       "inputs": {
         "nixpkgs": "nixpkgs",
-        "nixpkgs-nyanloutre-pysmart": "nixpkgs-nyanloutre-pysmart",
         "nixpkgs-unstable": "nixpkgs-unstable",
         "simple-nixos-mailserver": "simple-nixos-mailserver"
       }
diff --git a/flake.nix b/flake.nix
index afdacc5..a586e8b 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,12 +1,11 @@
 {
   inputs = {
-    nixpkgs.url = "flake:nixpkgs/nixos-21.05";
-    nixpkgs-unstable.url = "flake:nixpkgs/nixos-unstable";
-    nixpkgs-nyanloutre-pysmart.url = "github:nyanloutre/nixpkgs/pysmart-init";
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-21.05";
+    nixpkgs-unstable.url = "github:nixos/nixpkgs/nixos-unstable";
     simple-nixos-mailserver.url = "gitlab:simple-nixos-mailserver/nixos-mailserver/nixos-21.05";
   };
 
-  outputs = { self, nixpkgs, nixpkgs-unstable, simple-nixos-mailserver, nixpkgs-nyanloutre-pysmart }: {
+  outputs = { self, nixpkgs, nixpkgs-unstable, simple-nixos-mailserver }: {
     nixosConfigurations.loutreos = nixpkgs.lib.nixosSystem {
       system = "x86_64-linux";
       modules = [
@@ -19,23 +18,6 @@
         "${nixpkgs-unstable}/nixos/modules/services/audio/navidrome.nix"
         simple-nixos-mailserver.nixosModule
         ./systems/LoutreOS/configuration.nix
-        ({ pkgs, ... }: {
-          systemd.services.ipmihddtemp = {
-            description = "IPMI HDD temp fan control";
-            wantedBy = ["multi-user.target"];
-            path = with pkgs;[ ipmitool smartmontools ];
-            serviceConfig = {
-              ExecStart = with nixpkgs-nyanloutre-pysmart.legacyPackages.x86_64-linux;
-              let env = python3Packages.python.buildEnv.override {
-                extraLibs = with python3Packages;[ pysmart ];
-                ignoreCollisions = true;
-              };
-              in "${pkgs.writeShellScriptBin "run.sh" ''
-                ${env}/bin/python ${pkgs.writeScript "ipmihddtemp.py" "${builtins.readFile ./ipmihddtemp.py}"}
-              ''}/bin/run.sh";
-            };
-          };
-        })
       ];
     };
 
diff --git a/ipmihddtemp.py b/ipmihddtemp.py
deleted file mode 100644
index ee7e21f..0000000
--- a/ipmihddtemp.py
+++ /dev/null
@@ -1,42 +0,0 @@
-import math
-import subprocess
-import time
-from pySMART import DeviceList
-
-MIN_FAN_SPEED = 30
-MAX_FAN_SPEED = 100
-
-MIN_HDD_TEMP = 30
-MAX_HDD_TEMP = 50
-
-devlist = DeviceList()
-
-# Put fans in full speed mode
-subprocess.run(["ipmitool", "raw", "0x30", "0x45", "0x01", "0x01"])
-
-while True:
-    for device in devlist:
-        device.update()
-
-    # Linear fan speed between MIN_FAN_SPEED and MAX_FAN_SPEED
-    fan_speed = max(
-        min(
-            math.ceil(
-                MIN_FAN_SPEED
-                + (
-                    (MAX_FAN_SPEED - MIN_FAN_SPEED)
-                    * (
-                        (max([x.temperature for x in devlist]) - MIN_HDD_TEMP)
-                        / (MAX_HDD_TEMP - MIN_HDD_TEMP)
-                    )
-                )
-            ),
-            MAX_FAN_SPEED,
-        ),
-        MIN_FAN_SPEED,
-    )
-
-    subprocess.run(["ipmitool", "raw", "0x30", "0x70", "0x66", "0x01", "0x00", hex(fan_speed)])
-
-    time.sleep(10)
-